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Method for analyzing and processing persistent organic pollutants by microwave assisted base catalysis

A technology for the decomposition and treatment of organic pollutants, which is applied in the field of microwave-assisted alkali-catalyzed decomposition and treatment of persistent organic pollutants, which can solve the problems of long reaction time and high energy consumption, and achieve the effect of short reaction time and low energy consumption

Inactive Publication Date: 2009-06-24
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0006] In the BCD process, the second stage is the key part, but there are problems of long reaction time and high energy consumption in this stage

Method used

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Examples

Experimental program
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specific Embodiment

[0034] Microwave-assisted alkali-catalyzed decomposition process to treat PCBs in simulated polluted soil:

[0035] Select 2,4,5-trichlorobiphenyl (PCB29) as a model compound, prepare a stock solution of PCB29 with n-hexane, add it to a certain amount of soil that is not polluted by PCBs, stir and mix thoroughly, and put the solvent in a fume hood After volatilization, the soil with a PCB29 concentration of 100 mg / kg was obtained, stored in an airtight container away from light, and aged for one month for later use.

[0036] Adopt the microwave-assisted alkali catalytic decomposition device among the present invention, carry out the processing of simulated PCBs polluted soil, the steps are:

[0037] The first step is to mix the reactants. Take 0.5kg of simulated contaminated soil, 100mL of NaOH solution with a concentration of 10mol / L, 100mL of n-hexadecane as a hydrogen donor, and 50g of granular activated carbon as a catalyst and microwave absorbing material and mix well;

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Abstract

The invention discloses a method for treating persistent organic pollutant through base catalytic decomposition with the help of microwaves, which is to use base catalytic decomposition technology with the help of the microwaves to treat various wastes containing the persistent organic pollutant (POPs), utilize interaction of the microwaves and microwave absorbing materials as a catalyst to quickly raise the reaction temperature, and complete quick dechlorination of POP substances in the waste to be treated in the presence of base and a hydrogen donor together. The method can treat waste organochlorine pesticide (OCPs), polychlorinated biphenyl (PCBs) oil in transformers, soil and deposit severely polluted by the OCPs and the PCBs, waste incineration fly ash containing high-concentration bioxin (PCDD / Fs) and salt slurry in the chlorine alkali industry and the like, has short treatment time and high dechlorination efficiency, and can realize quick treatment of the various wastes containing the POPs.

Description

technical field [0001] The invention relates to a technology for treating organic pollutants, in particular to a microwave-assisted alkali-catalyzed decomposition method for treating persistent organic pollutants. Background technique [0002] Persistent Organic Pollutants (POPs for short), such as waste organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs) in transformer oil, PCBs in soil near transformer landfill sites, blast furnace / Domestic waste / medical waste incineration fly ash and dioxins (PCDD / Fs) in chlor-alkali industrial salt mud are a class of compounds that may cause serious harm to the environment and human health. Their characteristics mainly include: toxicity (may cause Reproductive disorders, gender abnormalities, hormone disorders, immune system impairment, behavioral abnormalities, cancer and birth deformities), refractory (degradation in the environment is very slow), fluidity (can carry out long-distance migration through air and water and...

Claims

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Application Information

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IPC IPC(8): A62D3/178A62D3/36A62D101/20
Inventor 刘希涛赵伟赵烨
Owner BEIJING NORMAL UNIVERSITY
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